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Proceedings Paper

Optical fiber humidity sensor with PVDF thin film as sensitive element
Author(s): Xiaobing Li; Minghong Yang; Jixiang Dai; Hongliang Liu; Dan Yin; Lijie Dong
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Paper Abstract

A novel optical fiber humidity sensor using polyvinylidene fluoride (PVDF) as sensitive material was proposed in this paper. Three-layer coating was deposited on the end-face of optical fiber, which constructs an extrinsic Fabry-Perot (F-P) interference structure. Ag layer deposited by DC magnetron sputtering was used as mirror layer in the F-P interference structure. PVDF layer was realized with Czochralski method as F-P cavity. Simulation was performed using data fitting to analysis the relevant parameters on sensor performance. Experimental result shows the interference fringe shifts to longer wavelength when relative humidity increases. The fringe shifted 2.4nm with a good linearity response when relative humidity increases from 11% to 97%. The linearity of interference fringe shift to relative humidity was 0.98415, the response time was less than 1min.

Paper Details

Date Published: 9 November 2010
PDF: 7 pages
Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78533T (9 November 2010); doi: 10.1117/12.871725
Show Author Affiliations
Xiaobing Li, Wuhan Univ. of Technology (China)
Minghong Yang, Wuhan Univ. of Technology (China)
Jixiang Dai, Wuhan Univ. of Technology (China)
Hongliang Liu, Wuhan Univ. of Technology (China)
Dan Yin, Wuhan Univ. of Technology (China)
Lijie Dong, Wuhan Univ. of Technology (China)

Published in SPIE Proceedings Vol. 7853:
Advanced Sensor Systems and Applications IV
Brian Culshaw; Yanbiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan; Lin Zhang, Editor(s)

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